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Liferay Portal and Liferay DXP Bypass via Double Encoded URL

Moderate severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated May 28, 2025

Package

maven com.liferay.portal:com.liferay.portal.impl (Maven)

Affected versions

>= 7.2.0, < 7.4.0
< 7.1.3

Patched versions

7.4.0
7.1.3
maven com.liferay.portal:release.dxp.bom (Maven)
< 7.0.10.fp93
>= 7.1.0, < 7.1.10.fp19
>= 7.2.0, < 7.2.10.fp7
7.0.10.fp93
7.1.10.fp19
7.2.10.fp7
maven com.liferay.portal:release.portal.bom (Maven)
< 7.3.1
7.3.1

Description

In Liferay Portal before 7.3.1, com.liferay.portal:com.liferay.portal.impl before 7.1.3 and 7.4.0, Liferay Portal 6.2 EE, and Liferay DXP 7.2, DXP 7.1 and DXP 7.0, the property 'portlet.resource.id.banned.paths.regexp' can be bypassed with doubled encoded URLs.

References

Published by the National Vulnerability Database Sep 24, 2020
Published to the GitHub Advisory Database May 24, 2022
Reviewed May 28, 2025
Last updated May 28, 2025

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(41st percentile)

Weaknesses

Improper Access Control

The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Learn more on MITRE.

CVE ID

CVE-2020-15840

GHSA ID

GHSA-vrwx-q9pj-x488

Source code

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